Contact person
Christina Wedin
Coordinator
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Analysis of Colophony in Products with Skin Contact
Colophony, also known as rosin, is a collection of resin acids that naturally occur in extractives from pine, spruce, and larch trees. Since pine oil is a common byproduct of the wood distillation process, colophony is often found extensively in pine oil. Allergic reactions to colophony are common in some individuals.
Purpose
Small amounts of colophony may be present in pulp and end up in various products, usually without issue. However, a Danish study of 2,000 eczema patients found that 3.7% had an allergy from skin contact with colophony. The highest risk occurs with prolonged exposure to adhesives in plasters, bandages, cosmetics, and sanitary products. This allergy can be lifelong.
Some markets regulate colophony levels in hygiene and cosmetic products, increasing the demand for analysis. At RISE, we provide expertise in measuring colophony content to ensure compliance with safety standards and minimize allergy risks.
Colophony is found in cosmetics, adhesives, paints, soaps, and industrial chemicals, appearing under names like rosin, resin oil, and tall oil resin. Awareness of these synonyms helps ensure accurate identification and analysis.
Methods
We employ methods to analyze the level of colophony in mass by utilizing gas chromatography to analyze resin acids. Occasionally, we utilize three specific resin acids - abietic acid, dehydroabietic acid, and 7-oxodehydroabietic acid - as markers for colophony. To conduct this analysis, a minimum of 20 grams of mass is required.
Delivery
RISE delivers a report with data in Excel format as well as relevant images and diagrams. It is compiled according to standard methods and includes measurement uncertainty assessment for reliable results. The report includes all relevant parameters as well as detailed comments and explanations for better understanding.
